Where’s my hippo? Surely that’s the question on your mind as you see signs for the missing hippo on the streets all over the world.

Where’s My Hippo is a global hunt for Herbert C. Hippos, a lost hippopotamus. Stickers, shirts, and posters are all part of the effort. You can join the search party on the official website of Herbert C. Hippos. And if you follow them on Twitter @wheresmyhippo, you are automatically enrolled in a contest for free merch!